1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
* and Arnd Bergmann, IBM Corp.
*/
#undef DEBUG
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/mod_devicetable.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/atomic.h>
#include <asm/errno.h>
#include <asm/topology.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
#include <asm/eeh.h>
#ifdef CONFIG_PPC_OF_PLATFORM_PCI
/* The probing of PCI controllers from of_platform is currently
* 64 bits only, mostly due to gratuitous differences between
* the 32 and 64 bits PCI code on PowerPC and the 32 bits one
* lacking some bits needed here.
*/
static int of_pci_phb_probe(struct platform_device *dev)
{
struct pci_controller *phb;
/* Check if we can do that ... */
if (ppc_md.pci_setup_phb == NULL)
return -ENODEV;
pr_info("Setting up PCI bus %pOF\n", dev->dev.of_node);
/* Alloc and setup PHB data structure */
phb = pcibios_alloc_controller(dev->dev.of_node);
if (!phb)
return -ENODEV;
/* Setup parent in sysfs */
phb->parent = &dev->dev;
/* Setup the PHB using arch provided callback */
if (ppc_md.pci_setup_phb(phb)) {
pcibios_free_controller(phb);
return -ENODEV;
}
/* Process "ranges" property */
pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
/* Init pci_dn data structures */
pci_devs_phb_init_dynamic(phb);
/* Create EEH devices for the PHB */
eeh_dev_phb_init_dynamic(phb);
/* Register devices with EEH */
if (dev->dev.of_node->child)
eeh_add_device_tree_early(PCI_DN(dev->dev.of_node));
/* Scan the bus */
pcibios_scan_phb(phb);
if (phb->bus == NULL)
return -ENXIO;
/* Claim resources. This might need some rework as well depending
* whether we are doing probe-only or not, like assigning unassigned
* resources etc...
*/
pcibios_claim_one_bus(phb->bus);
/* Add probed PCI devices to the device model */
pci_bus_add_devices(phb->bus);
return 0;
}
static const struct of_device_id of_pci_phb_ids[] = {
{ .type = "pci", },
{ .type = "pcix", },
{ .type = "pcie", },
{ .type = "pciex", },
{ .type = "ht", },
{}
};
static struct platform_driver of_pci_phb_driver = {
.probe = of_pci_phb_probe,
.driver = {
.name = "of-pci",
.of_match_table = of_pci_phb_ids,
},
};
builtin_platform_driver(of_pci_phb_driver);
#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
|
